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One thing you need to know right away about software processes

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is that there's not just one single process, but there are multiple,

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possible processes, depending on your context, depending on the kind of

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applications that you are developing. In this course, we are going to try

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to cover the spectrum of the possible processes, as much as

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possible, by focusing on four main software processes. The first one is

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what we call normally the waterfall process. And, we call it waterfall

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because in the process we go from one phase to the other

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in the same way in which water follows the flow

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in a waterfall. The second process that we consider is what

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we call evolutionary prototyping, and in this case, instead of

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following this set of rigid steps, all we're trying to do

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is to start with an initial prototype and evolve it

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based on the feedback from the customer. We will then move

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towards a slightly more formal process, which is the rational unified

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process or the unified software process. And this is a kind

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of project heavily based on the use of UML, so we

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will also cover UML when discussing this kind of project. Finally,

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the fourth kind of process we will consider is the family

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of agile software processes. And these are processes in which we

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sacrifice the discipline a little bi,t in order to be more

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flexible and be more able to account for changes and in

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particular for changes in requirements. We are going to cover each

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one of these four processes extensively in the rest of the class.